#include "led.h"
#include "key.h"
#include "delay.h"
#include "usart.h"
#include <stdio.h>
#include "systick.h"

int main(void)
{
    // 初始化
    USART_Init();
    LED_Init();
    Systick_Init();

    printf("SysTick timer program start\n");

    while(1)
    {
    }
}
